2NM/2NX/2NY/2NZ/2P0/2P6
1-4-82
(7) Black or white streaks appear horizontally.
Print example Cause of trouble
1. Dirty developer unit or terminals
2. Flawed or dirty drum unit Improper grounding
3. Dirty transfer roller terminals
Defective part Check description Corrective Action
1
Developer unit
1. Check the print image on
paper has a problem at an
interval equivalent to the cir-
cumference of the develop-
ing roller.
2. Check that the developing
roller is dirty at its ends or at
the developing bias tab.
1. If the ends of the developing roller and the
connecting terminals for developer bias are
dirty, clean.
2. Replace the developer unit. (see page 1-5-
30)
2
Drum unit 1. Check the print image on
paper has a problem at an
interval equivalent to the
circumference of the drum .
Execute drum refreshing.
(System Menu >Adjustment / Maintenance)
2. Check if the drum has
scratches.
Replace the drum unit. (see page 1-5-36)
3. Check the grounding tab of
the drum or the drum drive
shaft.
1. Check how the drive unit is mounted, and
correct, if necessary.
2. Replace the drum unit. (see page 1-5-36)
3
Transfer roller unit
1. Check the print image that
implies dirt, deformation, or
scratches on the transfer
roller, which will be appear-
ing at an interval equal to its
circumference .
If the print image has a problem, clean the
transfer roller by a soft cloth.
2. Check contamination and
deformation on the termi-
nals .
1. If the connecting terminals are deformed,
correct for a proper conduction
2. Replace transfer roller unit.(see page 1-5-
38)
4
Fuser unit Check the print image on paper
has a problem at an interval
equivalent to the circumference
of the fuser roller.
If the print image has a problem, clean the
fuser roller.
5
High voltage PWB The bias voltage output sup-
plied by the high voltage PWB is
not even.
Replace the high voltage PWB. (see page 2-2-
20)
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